Diego Maradona's eldest daughter claims that the Argentina shirt being auctioned is not the one her late father wore when he scored the infamous "Hand of God" goal against England.
Dalma Maradona said the top was actually worn by her father during the goalless first half of the 1986 World Cup quarter-final.
Steve Hodge, the former England player who says Maradona swapped shirts with him at the end of the game in Mexico City, is selling the shirt, which is set to fetch more than £4 million (US$5.2 million).
Auctioneers Sotheby's said they hired an external company that had provided a "conclusive photomatch" that proved it was authentic.
Dalma Maradona claimed the shirt her father wore in the second half, when he also scored one of the greatest goals in World Cup history, was in the hands of another owner, but she declined to name them.
"It's not that one. I don't want to say who has it because it's crazy. He [Diego Maradona] said it. He said, 'How am I going to give him the shirt of my life?'" she told reporters.
"This former player thinks he has my dad's second-half jersey, but it's a mix-up, he has the one from the first half. We wanted to clarify that so that people who want to buy it know the truth," Dalma said in separate comments to Channel 13 television.
A Sotheby's spokeswoman told AFP: "There was indeed a different shirt worn by Maradona in the first half, but there are clear differences between that and what was worn during the goals. And so, prior to putting this shirt for sale, we did extensive diligence and scientific research on the item to make sure it was the shirt worn by Maradona in the second half for the two goals."
The photomatching process had involved matching the shirt "to both goals examining unique details on various elements of the item, including the patch, stripes, and numbering".
It added that Maradona himself had acknowledged the provenance of the shirt himself, in his book Touched by God, and he recalls giving it to Hodge at the end of the match.
The online auction is scheduled for April 20 to May 4.